While I may not have the answer, I can sure offer a possible. I suffered the same question with my 1987 Pontiac 6000 STE. I took the car to a number of qualified mechanics and Pontiac service centers. As you can imagine, every one of them were more than willing to install a new transmission. I even took it to an old family friend who told me it's time to "put her down". After all the car did have 390K miles on the drive train. Anyway, after months of agonizing over this issue, it came to me like a light. Many of the functions of these modern cars, are inter-related. If one function characteristic changes, others compensate for that change. In my case, I was able to establish a pattern. By watching the temperature gauge.Once it dropped below 160 degrees the transmission would down shift. When the temp rose back to 180+ it would upshift. I deduced my thermostat was stuck open and everytime the engine temp dropped too low to keep the engine fucntioning effeciently the transmisssion responded. I changed the thermostat and solved my problems. I drove that car for another 80K miles without another downshift issue. That $6.00 purchase saved me $2800 on a new transmission! Give it a shot.
In a Pontiac Grand Am error code P0410 means there is an emissions problem.
problem with power steering 1994 Pontiac grand am 2.3L
Belt driven accessory lower right side of engine
I just had this problem with my 2002 Pontiac Grand Am. The problem is a short in the "multi-function switch." When I took it to get fixed, they told me that a lot of Pontiac Grand Ams have had this problem, and mine was fixed through warranty. If that is not the problem with your car, check the "signal flasher relay." Hope I helped!
That all depends on the problem your having and grand ams are full of electrical problems.
my grand am it turns off when it gets hot how can i fix problem
My grandson had to replace the motor mounts on his Pontiac Grand Prix last year and now the mechanic says they need replaced again. He has hardly driven it. How can that be
security lock out had same problem with our 2004 grand am
Pontiac Grand Am was created in 1973.
The factory tires and rims from a 2001 Pontiac grand am cannot work properly on a 2003 Pontiac grand am.
Rims and tires from a 2001 Pontiac Grand Am will fit on a 2003 Pontiac Grand Am. They have the same lug nut pattern.
If a 2000 Pontiac Grand Am shuts off while in drive, there could be a problem with the passlock sensor. There could also be an issue with the fuel pump.
you might wanna chage the plugs and wires. what other symptoms does the car have. i am having the same problem in my 2003 pontiac grand prix gt
The front speakers on a 2000 Pontiac Grand Am are 4x6. The rear speakers on a Pontiac Grand Am are 6x9.
How do i add antifreeze to a pontiac grand am 2004
Pontiac Grand Prix was created in 1962.
The warning lights on a 1998 Pontiac Grand Am mean that the vehicle's computer has detected a problem. This can range from low tire pressure to malfunctions within the engine itself.
A 1993 Pontiac Grand Am weighs approximately 2,828 lbs. The Pontiac Grand Am stopped production in the year 2005. The car was replaced with the Pontiac G6.
Where are the vacuum hose located at on '97 Pontiac grand am? Where are the vacuum hose located at on '97 Pontiac grand am?
sorry i cant answer that ? but just curious I have a 2003 Pontiac grand am se and the front brakes have to be replaced about every 7 months, are you haviing any problem like that with your car?
do you have a diagram for pontiac grand am 2005 thermostat
The water pump is located on inside of the timing cover. It is driven by the timing chain.
The 2004 Pontiac Grand Prix is not something that is won as it's not a competition of any sorts. The 2004 Pontiac Grand Prix is a car sold by the Pontiac car company.